Re: bug-reference-prog-mode slows down CC Mode's scrolling by ~7%

[Stefan Monnier]

> Do you have some Lisp to show that invisible text isn't fontified by
> jit-lock?

    src/emacs -Q lisp/subr.el -f outline-minor-mode --eval '(hide-sublevels 1)'

then go to the line that says "subr.el ends here" and do

    M-: (get-text-property (- (point) 10) 'fontified) RET

and it will probably say nil.


        Stefan


PS: My own config enables `outline-minor-mode` and calls
`hide-sublevels` in a similar way, so I'd notice the performance
difference if the whole buffer were fontified ;-)